/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/MeshIndexUtil.h
Find list of unique vertices that are contained in one or more triangles
namespace UE { namespace Geometry { void UE::Geometry::TriangleToVertexIDs ( const [FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) * Mesh, const [TArray](API\Runtime\Core\Containers\TArray)< int > & TriangleIDs, [TArray](API\Runtime\Core\Containers\TArray)< int > & VertexIDsOut ) } }